I have a Mercruiser 305 with a Mercruiser 2-barrel carb. I replaced
the fuel pump last fall as it left us in the middle of the lake. I
took it out today for a test run. Dang thing would not start worth a
darn. Then when it did, it would gradually run slower and slower until
it quit. About the only way I could get it started was to have the
throtle lever all the way forward. I turned up the idle a little which
helped keep it running. It ran great at anything above idle. Pulled
well, etc. My thought is that the idle mixture may be too lean. I at
least want to try that before taking it in to the shop. Your thoughts
would be appreciated. Thanks.